The Church of Constantinople is one of the fourteen or fifteen autocephalous churches, also referred to as the Ecumenical Patriarchate. It is headed by the Ecumenical Patriarch, who has the status of primus inter pares ("first among equals") among the world's Orthodox bishops.

The local churches of the Ecumenical Patriarchate consist of five archdioceses, three churches, thirteen metropolises, and one diocese, each of which reports directly to the Patriarch of Constantinople with no intervening authority. In addition, three of the five archdioceses have internal metropolises (16 in all), which are part of their respective archdioceses rather than distinct administrative entities, unlike the other metropolises.

Peculiar prerogatives of the patriarchate

In history and in canonical literature (i.e. the Church's canons and traditional commentaries on them), the Ecumenical Patriarchate has been granted certain prerogatives (presbeia) which other autocephalous Orthodox churches do not have. Not all of these prerogatives are today universally acknowledged, though all do have precedents in history and canonical references. The nature of these prerogatives or even their very existence is hotly contested on canonical grounds by certain other Orthodox churches, particularly the Church of Russia.

The entrance to the headquarters of the Ecumenical Patriarchate in the Phanar in Constantinople

The following is a (non-exhaustive) list of these prerogatives and their reference points: